Notification only pops up when user is in Main screen (HomeScreen). But when user navigates to other pages, notification is received but alert is not displayed.
Try putting you alert in you top component, depending on your directory structure it could be index.os.js. I use redux to trigger the alert but if not using redux then you have to figure out a way to trigger it.
Notification only pops up when user is in Main screen (HomeScreen). But when user navigates to other pages, notification is received but alert is not displayed.